An investigation has found that a failed Russian rocket launch three weeks ago that aborted after just two minutes was caused by a sensor that was damaged during assembly, a top Russian official said on Thursday.

Defense Secretary Jim Mattis on Thursday said Russia’s deployment of nuclear-capable missiles in violation of an arms treaty is “untenable” and unless Moscow changes, the U.S. will have to match that military capability.

The U.S. envoy to NATO on Tuesday said that Russia must halt development of new missiles that could carry nuclear warheads and warned that the United States could “take out” the system if it becomes operational.

North Korea announced Saturday it will suspend nuclear tests and intercontinental ballistic missile launches ahead of its summits with Seoul and Washington, but stopped well short of suggesting it has any intention of giving up its nuclear weapons or scale back its production of missiles and their related component parts.

The U.S. Congressional delegation from Hawaii urged the military to take over missile alerts at a hearing in Hawaii today on the false ballistic missile alert that sent Hawaii residents scrambling for 38 minutes on January 13.

As with nearly every ballistic missile launched by Yemen’s Shiite rebels targeting Saudi Arabia, the kingdom overnight said it intercepted all seven fired — but online videos raise new questions about those claims.

Japan’s public broadcaster mistakenly sent an alert Tuesday warning citizens of a North Korean missile launch and urging them to seek immediate shelter, then minutes later corrected it, days after a similar error in Hawaii.

North Korea abruptly ended a 10-week pause in its weapons testing Tuesday by launching what the Pentagon believes was an intercontinental ballistic missile, a move that will escalate already high tensions with Washington.

Iran’s supreme leader has restricted the range of ballistic missiles manufactured in the country to 2,000 kilometers (1,240 miles), the head of the paramilitary Revolutionary Guard said Tuesday, which limits their reach to only regional Mideast targets.

The U.S. military flew advanced bombers and stealth jets over the Korean Peninsula and near Japan in drills with South Korean and Japanese warplanes on Monday, three days after North Korea fired a missile over Japan.